Liquid cooling system



Dec. 20, 1938. R C 2,140,896

LIQUID COOLING SYSTEM Filed Nv. 16, 1937 4 Sheets-Sheet 1 INVENTOR[0/111 1%. Bram '|w g WM an @221 ATTORNEY Dec. 20, 1938. J. N]. BRUCELIQUID COOLING SYSTEM Filed Nov. 16, 1937 4 Sheets-Sheet 2 INVENTOR Il/m 121. Bram BY A W671 AM (4Z1 ATTORNEY w\ wmwvw NW Dec. 20, 1938. J. MBRUCE 2,140,896,

LIQUID COOLING SYSTEM Filed Nov. 16, 1937 4 Sheets-Sheet s ATTORNEY J.M. BRUCE LIQUID COOLING SYSTEM Dec. 20, 1938.

Filed Nov. 16, 195'} 4 Sheets-Sheet 4 INVENTOR ,falm- 1% firua :1 5filia Rm Mk flZZM WM ATTORNEY Patented Dec. 20, 193s UNITED STATESPATENT, OFFICE 1'! Claims.

This invention relates to a liquid cooling system and, moreparticularly, to a method and apparatus for cooling and dispensing brewfrom the brewers barrels or containers.

5 In accordance with this invention one or more brewers barre1s arepositioned within an insulated cabinet which may be positioned directlyunder the baror in a. room or space below the barroom. A circulatingrefrigerant is pumped through cooling coils positioned in the bottom ofthe cabinet, the refrigerant being supplied by suitable refrigeratingmechanism which may be positioned outside the cabinet. The bottom of thecabinet is constructed to provide a leakproof receptacle which containsthe cooling liquid in which the cooling coils are immersed. A coolingliquid pump is provided for each brewers barrel positioned within thecabinet, each pump being driven by an individual motor. A spray head orspray hoop is positioned adjacent th top of each barrel and is providedwith suitable spray nozzles or apertures for projecting a spray ofcooling liquid over the side walls of the barrel. The cooling liquid maycomprise water containing a suitable refrigerant, such asethyleneglycol, so that the temperature of the cooling liquid may be broughtdown below the freezing temperature of water to a point as low as 10 F.v I

A dispensing conduit extends from the bottom of each barrel upwardly toa tap positioned adjacent the bar table. Each dispensing conduit isdetachably connected to the barrel through a suitable valve connection,which can be detached from the barrel at any time and seal the barrel soas to prevent the outfiqw of brew therefrom. Thus, the dispensingapparatus can be removed from the barrels as desired for sterilizationand cleaning. Electrical control means are provided for con- 0 trollingthe temperature of the brew flowing through the dispensing conduit andalso to control the temperature of the cooling liquid or the atmospherewithin the insulated cabinet. A thermal unit, preferably associated withthe-valve 45 connection which connects the dispensing conduit to thebarrel, operates to close a switch in the pump motor circuit connectedthereto when the temperature of the brew flowing through the valveconnection and into the dispensing conduit 5() rises above apredetermined dispensing tempera- .ture, thus throwing the motor intooperation, which in turn drives the pump to pump cooling liquid to'thespray head or hoop and spray the cooling liquid over the side walls ofthe barrel.

55 When the temperature of the brew falls below the desired dispensingtemperature range of the brew, say, 40 F., the thermal unit in the valveconnection operates to open the switch in the pump motor circuit to haltthe motor and terminate further spraying action of the spray over the 5barrel walls. Thus, the spraying of the barrel walls may be carried onintermittently and only when further cooling of the brew flowing throughthe dispensing conduit is desired.

Electric control means is also provided for con- 10 trolling theoperation of the compressor motor which supplies cooling refrigerant tothe coils through an expansion valve. The electric control means maycomprise a thermal control unit positioned in contact with the coolingliquid at the 15 bottom of the cabinet or otherwise positioned in thecabinet; When the cooling liquid held in the pool at the bottom of thecabinet rises above a predetermined temperature ran e, he thermal unitoperates to throw,a switch in the motor 2! circuit which operates therefrigerant compressor motor. The compressor, when operating, causes aflow of liquid refrigerant to flow through an expansion valve andthrough the cooling coils at the bottom of the cabinet and returnthrough a 25 suitable conduit to the compressor in the form of a gas. Arefrigerant found to be satisfactory is methyl chloride (CHsCl), whichrefrigerant has no detrimental effect on the conduits through which itflowsand which has a high heat-absorp- 30 tion efliciency. Thecompressor motor may also be electrically connected and controlled by athermal' element attached to the gas return line feeding the returninggases to the compressor, which thermal element is positioned within theinsulated 35 cabinet and may be made operative by the predeterminedtemperature of the returning gas. When the returning gas reaches a pointabove a .predetermined temperature, this thermal unit will also operateto throw the compressor motor 40 into operation, so as to further coolthe cooling liquid and the atmosphere surrounding the barrels in theinsulating cabinet. A pan or catch basin-positioned below thebarrelsreceives the spray liquid dropping from the sides of the barrel.This catch pan is positioned at an angle so as to cause the coolingliquid cow lected therein to flow to one end of the cabinet and througha suitable fine mesh screen which collects any foreign matter which mayhave dropped into the pan. The cooling liquid drops ;onto the coolingcoils at one end of the cabinet and then flows over the series ofcooling coils to the other end of the cabinet, at which end the pumpsare statined for pumping the cooling liq- 5K uid back through the spraydevices. As thus arranged, it will be noted that the cooling liquiddripping from any of the barrels positioned within the cabinet must flowover and into contact with the full length of the cooling coils at thebottom of the cabinet, thus insuring complete and uniform cooling of thecooling liquid before it is again circulated through the spray devices.

It is thus seen that the temperature of the brew flowing from eachindividual barrel is" independently controlled, providing an efficientand economical brewtemperature control mechanism, which operates onlywhen the brew fiowing through the dispensing conduit rises above apredetermined temperature. In like manner, the compressor motor and therefrigerating system only operate when further cooling of the coolingliquid in the cabinet is desired and when the temperature of the coolingliquid in the cabinet rises above a predetermined cooling temperature.The cooling apparatus as thus provided is substantiallyioolproof inoperation and, since the spray heads leading to each individual barrelare individually operated, when cooling of brew in that particularbarrel is required, high operating efficiency can be obtained, andrepairs or adjustments can be easily and quickly made, should this bedesired, due to thefact that all parts are easily and quickly accessibleand trouble in the system can be quickly located and corrected.Furthermore, the thermal unit positioned in the brew outflow valveleading. from the barrel to the dispensing conduit can be operated atextremely low voltages, so that no danger of shock to the operator orbar attendant can result should the electric control mechanism get outof order. A highly eflicient dispensing and cooling system permittingaccurate cooling and temperature control of the brew flowing from thebrewers barrel, is thus provided.

An object of the invention is to provide an improved cooling systemwhereby the brew flow- ;ing from the brewers barrels or containers maybe accurately controlled and regulated, permitting the drafting of brewfrom such barrels or containers in the most healthful and palatablecondition.

Another object of this invention, is to provide an improvedbrew-dispensing and cooling apparatus assembled in a compact unit,occupying a minimum of space on the brew-dispensing premises, which canbe constructed at relatively low cost compared with apparatus heretoforeprovided, which can be maintained with a. minimum of cost and attention,which can be quickly and easily adjusted to suit individualrequirements, and which assures dispensing-of the brew directly from thebrewers barrel or container in the most healthful and palatablecondition.

Another object of this invention is to provide a method and apparatusfor spraying a' cooling liquid projected over a brewers barrel within arefrigerated cabinet so that cooling of the brew within the barrel willautomatically proceed until the desired potable temperature of the brewwith in the barrel has been obtained, and thereafter which willautomatically continue in operation or be thrown out of operation withinthe maxima and minima limits of a prescribed temperature range. a

An object of this'invention is to provide method and .means for cooling'a cooling liquid projected over the brewers barrels in a. refrigeratedcabinet so that uniform and r pid cooling of the cooling liquid isobtained.

Another object of this invention is to provide automatic means forcontrolling the brew within the brewers barrels within the desiredpotable temperature range.

Still another object of this invention is to provide an improved methodand apparatus for dispensing and cooling brew and maintaining the brewwithin the most palatable temperature range efliciently and economicallyand with a minimum of attention.

Another object of this invention is to provide an improved method fordispensing and cooling brew' directly from the brewers barrelefliciently, economically and expeditiously and in the most healthful,zestful and inviting condition, irrespective of customer demand.

Other objects of this invention will become apparent as the disclosureproceeds.

Various other features and advantages of the invention will be apparentfrom the following particular description and from an inspection of theaccompanying drawings.

' Although the novel features which are believed to be characteristic ofthis invention will be particularly pointed out in the claims appendedhereto, the invention itself, as to its objects and advantages, and themanner in which it may be carried out, may be better understood byreferring to the following description taken in connection with theaccompanying drawings forming a part thereof, in which Fig. 1 is a rearelevational view of my improved brew cooling and dispensing apparatus asit appears when standing behind the bar, certain parts being broken awayto illustrate certain structural features thereof;

Fig. 2 is a horizontal cross-sectional view of my improved brew coolingand dispensing apparatus, this view being taken along line 2-2 of Fig.1;

Fig. 3 is a transverse vertical cross-sectional View through the brewcooling and dispensing apparatus, this view being taken along line 3-3of Fig. 1;

Fig. 4 is an end view of the brew cooling and dispensing apparatus,certain parts being broken away to more clearly illustrate certainstructural features thereof, this view being taken along line 44 ofFig.1;

Fig. 5 is a diagrammatic view of a Wiring diagram and associated controlmechanism for controlling the temperature of the brew ejected from eachindividual brewers barrel;

Fig. 6 is a perspective View of the refrigerating mechanism operativelyconnected to the cooling coils positioned at the bottom of theinsulating cabinet, this view also showing associated therewith thewiring diagram and associated control mechanism for controlling the flowof the refrigerant through thecooling coil;

Fig. 7 is a perspective view of the cooling liquid spray deviceassociated with a brewers barrel including a. driven pump and conduitconnection thereto, this view also showing associated therewith thewiring diagram and associated control mechanism for controlling the flowof cooling liquid through the spray head;

Fig. 8 is an enlarged fragmentary cross-sectional view showing a portionof .the brewers barrel having a draft tube and draft tubeconnectionassociated therewith, the draft tube connection being providedwith a temperature control switch, this view being taken on line 8-8 ofFig. 7; and Fig. 9 is an enlarged fragmentary cross-sectional viewshowing the temperature control switch as it appears when separatelyattached to the barrel unconnected with the draft tube connection.

Similar reference characters refer to similar parts throughout theseveral views of the drawings and the specification.

Referring more particularly to Figs. 1, 2 and 3, my improved brewdispensing system comprises an insulated refrigerated cabinet withinwhich the brewers beverage transportation barrels are contained. Thecabinet may be positioned either directly below the bar or in a room orchamber below the barroom floor. The refrigerating cabinet may be of anysuitable size or form to conveniently house the required number ofbrewers beverage barrels B, I having illus trated, by way of exampleonly, in Figs. 1 and 2 a cabinet of a size to conveniently contain threebrewers barrels identified as Bl, B2 and B3. The cabinet here showncomprises a front wall I,

a rear wall 2, a bottom wall 3, a top wall 4, and end walls 5 and 6, allof which are suitably insulated and reenforced to provide an effectivelyinsulated sturdy construction. More particularly, each of thesurrounding walls may comprise an outer sheeting I spaced from an innersheeting 8, preferably of metal, between which is positioned aninsulating material .9. The cabinet is provided withsuitable dooropenings ID for each barrel in the front wall I thereof for theconvenient insertion and removal of the barrels, a door opening beingprovided for each barrel to be placed in the cabinet. The 'door openingis closed by means of a suitable insulated door ll having a sealingflange l2 which prevents the escape of the cold atmosphere within thecabinet. The cabinet shown in Figs. 1, 2 and 3 may be positioneddirectly under the bar table with the back wall 2 of the cabinetpositioned adjacent the front wall of the bar. It will be appreciated,however, that the refrigerating cabinet can be positioned directly underthe bar floor, which is often desirable in the larger brew dispensingestablishments.

The brew barrels BI, B2 and B3, as shown in Figs. 1, 2 and 3, arepreferably spaced a convenient distance above the bottom wall 3 of thecabinet, the brew barrels being supported upon individual racks whichmay be formed of metal and which may rest upon the bottom wall 3 of thecabinet. Each of the barrel supporting racks may comprise an inclinedtable portion 15 with a front supporting flange l6 and a rear supportingflange ll formed integral therewith. The

table portion I5 is provided with openings 18 to liquid dripping fromthe barrel to pass through the table portion and into a drip panpositioned therebelow. The front supporting flange l6 near the dooropening is of less height than the rear supporting flange I! so that thebrew barrels are each supported on the table portion I5 in an uprightslightly inclined position within 'the cabinet, the barrels beinginclined toward the door openings l0 and the dispensing taps.

A drip pan extends substantially the full length and width of thecabinet and is positioned below permit the cooling the barrel supportingracks. The drip pan may be formedfrom sheet metal comprising a bottomwall 20 slightly'inclined toward one end of the cabinet, which"'bottom'wall is closed by surrounding side walls 2i. Th' drip pan isdesigned to collect a cooling liquid w which'is sprayed over the sidewalls of the barrel and conduct the cooling liquid toward one end of thecabinet, as illustrated more particularly in Fig. 1. A screen 22 of finewire mesh is provided at the lower end of the drip pan through which thecooling liquid flowing along the drip pan may escape. The screen alsooperated to segregate and screen out any waste material which may haveentered into the cabinet. The drip pan and associated screen 22 may beheld in raised position across the bottom wall 2 of the cabinet bysuitable supporting legs 23 attached thereto.

A pool of cooling liquid to is stored in the bottom of the cabinet, thebottom wall 3, the front wall I, the rear wall 2, and the ends walls 5and 6 being suitably caulked to prevent the escape of the coolingliquid. As shown more particularly in Figs. 1, 2 and 7, the pool ofcooling liquid w is circulated at predetermined intervals through anindividual spray system for each barrel comprising a pump 25 having aninlet 26 positioned at one end of the cabinet opposite the end of thecabinet where the screen 22 is located. A suitable drain may be providedto permit drainage of the cooling liquid to from the bottom of thecabinet.

As shown more particularly in Figs. 1, 2, 3 and 6, a cooling unit ispositioned adjacent the bottom wall 3 of the cabinet and extendssubstan-. tially the full length thereof to maintain the temperature ofthe cooling liquid w within which the cooling unit is immersed at thedesired temperature. The cooling unit may be of any desiredconstruction. I have shown for purposes of illustration a cooling unitincluding a serpentine cooling coil 52 immersed in the cooling liquid w,which is supplied with a well known cooling material, such as methylchloride (CHaCl) delivered to the cooling coils 52 under pressure.

means of power transmission mechanism which may be contained within andprotected by the box enclosure 56. the mechanism in the box enclosure.56being connected to themotor 55 by means of suitable drive mechanism. Acondenser 51. is provided within which the refrigerant is condensed fromits compressed gaseous form to a liquid state. The compressor 53receives'the expanded gas from the coil 52 through a lead pipe 58, whichgas passes thence intothe compressor 53 where it is compressed. Thecompressed gas passes from the compressor 53 through a lead pipe 59 intothe top of the condenser 51.

The condenser 51 may be of any desired form and may comprise a pluralityof serpentine coils 60 provided with cooling fins. A fan 6| driven bythe motor 55 blows a stream of air onto the fins to cool the same andextract the heat from the compressed gas, causing the gas to liquidateand drop into a receiver 32. The receptacle 62 is enclosed and connectedto the fin coils by means of a suitable conduit connection 53. Theliquefied refrigerant passes from the receptacle 62 through the conduit54 and through an'expanslorr'valve 64 located in the cabinet beforepassing through the lead pipe 65 and thence to the cool- Any suitablerefrigerant may be used. Methyl chloride has been found satisfactory dueto the fact that it does not have any appreciable corform cooling of allof the cooling liquid circulated through the spray system is thusaccomplished. Each pump 25 may be of any desired construction,preferably of such construction as to permit the same to operate whenimmersed in the cooling liquid. It will be noted by referring to Figs.1, 2 and '7, that each pump is shown operatively connected to anoutwardly extending drive shaft extending through a leak-proof gasketembedded in the end Wall 5 of the cabinet. A driving motor 28 isconnected to each pump drive shaft 21 at a point exterior to thecabinet, the motors 28 being supported by means of a suitable bracket 29positioned within a motor housing 30. Each motor 28 is operativelyconnected to its pump 25 by a drive belt 3! trained over the motorpulley 32 and pump pulley 33. As thus constructed, the motor 28 cannotcome into contact with the cooling liquid w, which might otherwise havea deteriorating effect on the motor, or otherwise adversely affectsatisfactory operation thereof.

Each pump 25 is provided with an outlet port 35 connected to a supplyconduit which has a portion 36, which rises vertically toward the upperend of the cabinet. If desired, the vertical portion 36 of the supplyconduit may be positioned within the insulated end Wall 5, so as not tointerfere with the free insertion of the brewers barrel B3 positionedadjacent the end wall 5. The conduit portion 36 is connected to ahorizontally extending conduit portion 38 positioned adjacent the topwall 4' of the cabinet, which conduit portion 38 may be supported bymeans of suitable brackets 39 fixed to the rear wall 2 of the cabinet.Each horizontal conduit portion 38 is tapped to supply the coolingliquid to a spray device or spray hoop 40 positioned adjacent the upperend of each of the brewers barrels, the spray hoops 40 having suitablespray apertures 4| in the lower face thereof, which openings serve asnozzles to project a downpour of the cooling liquid w against the sidesof the barrel. The cooling liquid trickles down over the body of thebarrel and drips from the bottom of the barrel back into the pool ofcooling liquid at the bottom of the cabinet. Thus a film of coolingliquid substantially completely encases the barrel. The conduitportion38 is connected to the spray hoop 40 by a flexible conduit connection 42through a T-shaped coupling 43 shown more particularly in Fig. 7. Thusit will be noted that each barrel is individually equipped with aseparate spray hoop 40, pump 25, driving motor 28 and individualconnections between the pump and spray hoop.

As shown more particularly in Figs. 2 and 3 of the drawings each hoop 40may be provided with a supporting band or bar 40a secured thereto, whichband is adapted to rest on the upper end of the barrel to support thehoop in proper spray position. The band 4011 also provides a convenientmeans by which the hoop may be suspended in the cabinet by a bracket 40bwhen the barrel is removed' from the cabinet. The bracket 46b may beattached to the upper wall 4 of the cabinet as shown in Figs. 1 and 2.

.wing portion for each of the openings Referring more particularly toFigs. 1, 3, 7 and 8, the brew is tapped from the bottom of each barreland is conducted through a substantially vertically extending draft tube45 to a dispensing faucet 46 conveniently positioned adjacent the bartable. The dispensing apparatus is detachably connected to the barreland is so constructed that it can be removed at any time for cleaningand sterilization without appreciable loss of brew and substantiallywithout inconvenience or annoyance to the retail merchant. Thedispensing apparatus includes a plug device 4'! having a shutoff valveassociated therewith, which forms a permanent part of the barrel. Asubstantially straight draft conduit 45 is detachably connected to anelbow connection 48 which is in turn detachably connected to the plug 41permanently associated with the barrel.

The plug 41 extends through the side wall 49 of the barrel and ispreferably positioned adjacent the bottom wall 50 thereof, as shown inFig. 8, so that the last drop of brew can be removed from the barrel.The plug connection comprises generally a tubular collar member 66 whichtightly fits within a corresponding opening cut in the barrel wall 49.The tubular collar has an end wall 61 on the inner end thereof, whichend wall is provided with one or more brew discharge openings 68. Arotatable closure member 69 seats against the end wall 61 and isrotatably mounted thereon by means of a suitable pivot pin or bolt Ill.The inner' end of the pivot pin or bolt 10 is provided with a head Hhaving a generally square contour so that the head H can be manipulatedby a suitable instrument to rotate the closure member 69. The inner endof the stud bolt 19 is threaded to receive a suitable nut 12. Theclosure member 69 is provided with a 68. By turning the square head H,the wing portions may be manipulated so as to close and open thedischarge ports 68 provided in the end wall 61 cf the sleeve-member 66.The wing portions may be held in closed leakproof, valve-seatingengagement over the discharge ports 68 by tightening up on the nut 12,as will be evident by those skilled in the art.

If desired, the wing portions may be provided with a gasket 13 toprovide a tight seal, which gasket casing is formed of metal or othermaterial which has no deleterious effect on the brew. It is understoodthat when the-barrels are not in use or when filled with brew duringtransportation, the wing closures are necessarily arranged inport-closing position and are swung into portopening position only whenthe dispensing apparatus now to be described is attached thereto.

The dispensing apparatus comprises a separate elbow connection 48, asmore particularly illustrated in Fig. 8. The elbow connection comprisesa substantially straight tube portion 15 and a riser portion 16, whichis detachably connected to the lower end of the vertically extendingdraft" I member 41. The collarv portion 82 is provided with a gasketmember 84, preferably formed of metal, which seats against the shoulderportion 4 conduit portion 48 rises above the desired 83 and provides aleakproof fit therebetween.

fixedly retained to the The elbow connection is plug device 41 by meansof a pair of wing elements 85 extending laterally from the tube portion15. The wing elements 85 are insertable through corresponding openingsprovided in the collar member 88. By turning the elbow connection 48,the wing elements 85 maybe inserted through the bayonet slots providedin collar member 88, and by again turning the elbow connection 48, thewing elements 85 can be swung into locking engagement with the inwardlyextending lips positioned between the bayonet slots to provide aleakproof connection.

The relatively straight conduit portion 48 is provided with abrew-containing passage 5 sufliciently large to permit the insertiontherein of a thermometerbr thermo member 98, which preferably extendscentrally of the brew passage e so as to permit the brew to flow aroundthe same in passing into the riser portion 18 of the elbow connection.The .thermo member 98 is provided with a suitable threaded neck portion9| which may be screwed into a boss portion 92, a suitable gasket 93being provided to prevent leakage of the brew out through the bossportion 92. The neck portion 9| of the thermal unit 98 may also beprovided with mal unit in position and prevent leakage of the brew. Theneck portion 9| of the thermal unit 98 is provided with an electricalswitch element, well known in the art, which element is connected toelectrical terminals 95 and 98. The switch element, contained in theneck portion 9|, is so constructed that when the brew in the conduitportion 48 rises above a predetermined temperature, the switch will beclosed by the action of the thermal unit, permitting electrical currentto flow through the terminal wire 95 and through the motor switch 91housed within the switch box 98.

The thermal unit is so adjusted as to close the switch when thetemperature of the brew in the potable temperature of the brew, which isapproximately 42 F. The thermal unit 98 may comprise'either a mercurycontrolled switch, well known in the art, which is controlled by theexpansion of the mercury in the thermal unit, or, prises a metallicmember which is afiected by changes in temperature and controls theswitch mechanism. Both types of thermal units above described aregenerally known in the art, making unnecessary a detailed description ofthe construction and operation thereof.

As shown in Fig. 9, the thermal control switch might also be mounted ina bung 288 to support the thermal unit 98 which projects into thebarrel, although it is preferable to mount it in the elbow connection 48of the dispensing mechanism so that it forms a part thereof, the brewdraft mechanism being detachable to permit cleaning and sterilizationthereof.

Referring more particularly to Figs. 5 and '7,

current is supplied to each of the individual motors 28 through powerlines I88 and I8I. Current flows from the power line I8I through theconnecting wires I88 and I89 to'the motor 28 and thence flows throughthe motor wire 99 to a terminal point I in the switch box. The switch 91comprises more particularly a solenoid I82 which operates a magnet I83having a terminal I84. When the solenoid I82 is energized, the terminalI84 is moved into contact with terminal points I85 and I86, thus closingthe a nut 94tofurther lock the the'r-- preferably, comsimilarlyconnected to the power wires w ll flow from the power line motor circuitand permitting current to flowv through the lead wire 99 through theterminal point I85 through the terminal connection I84 through theterminal point I88 and finally through the lead wire I I8 to the powerwire I88. It will be noted, however, that the solenoid I82 is energizedby the thermo switch 98. The terminal wire 95 from the thermo switch 98is connected to the solenoid I82, and lead wire III from the solenoid isconnected to the lead wire H8 connected to the power wire I88. Terminalwire 98 leading from the thermal unit 98 is preferably connected to asuitable stepdown transformer or resistance I81 which is connected tothe lead wire 2' and to the lead wire I88 connected to the power wireI8I.

Assuming that the brew flowing into the passage e of the elbow portion48 potable temperature of, say, 42 noted that the thermal switch 98 K,it will be will close solenoid circuit, which permits a flow ofelectrical energy from the power line I8I through the lead wires I88 andH2, through'the resistance I81 to the terminal wire 98, through thethermo switch 98, through the terminal wire 95, through the solenoidI82, through the lead wires III, H8 and back to the power wire I88,electrical circuitwhich operates to energize the solenoid I82. Uponenergization of the solenoid I82 the terminal connection I84 moves intocontact with the terminal points I85 and I88 so as to close the motorcircuit. Electrical current will then flow from the power wire throughthe lead wires I88 and I89, through the motor 28, through the leadwire99, through the terminal point I85 and then through the terminalconnection I84, through the terminal point I88, through the lead wireII8 to' the power wire I88. The motor will continue tooperate until thethermal switch 98 breaks the circuit so as to deenergize the solenoidI82, permitting the contact connection I84 to move out of electricalcontact with the contact points I85 and I88, thus breaking the motorcircuit and halting the motor.

It will be understood that there is an independent motor 28 andelectrical circuit connection for each spray hoop 48, so that only thosebarrels are sprayed brew contents have risen above the desiredpredetermined temperature. Since each motor and motor circuit, includingswitch 91 and thermal switch 98 may be of similar construction and IMand I88, they need not here be further described.

Referring more particularly to Fig. 6, the motor which operates thecompressor is also thermostatically controlled by a wiring connectionwhich may be similar to that described and illustrated in Fig. '7. ,Athermal switch I28, of suitable type, may be connected to therefrigerant return pipe 58, so as to be thrown into and out of operationby the temperature of the returning refrigerant gas. In other words,when the refrigerant gas returning through the conduit 58. rises above apredetermined temperature, the thermal switch I28 is closed so as tothrow the motor switch in the switch box I2I to operate the the liquidrefrigerant through the liquid refrigerantsupply pipe 54, the connection85 and the coils 52. The motor switch contained in the switch box l2Imay comprise a solenoid switch similar to the switch 91 motor 28 intoand out of operation.

When the. thermal switch I28 is closed, current motor and drive,

rises above a v completing an with cooling liquid whose.

which throws the pump IilI through the 76 lead wire I22, through themotor wire I23, through the compressor motor 55 and back through themotor lead wire I24 into the switch box I 2I to a terminal point I25therein. When the solenoid I 26 is energized, as will be hereinafterexplained, the core I21 thereof moves the terminal connection I28 intocontact with terminal points I25 and I29, terminal point I29 beingconnected to lead wire I30 to the power wire I00.

When the thermal switch I20 is closed, the solenoid I26 is energized bycurrent which flows from the power wire IOI through lead wire I22,through lead wire I3I and through the thermal unit I20. From thethermal'unit I20, the current flows through the lead wire I32, throughthe solenoid I26, through the lead wires I 33 and I30 and back to thepower wire I00. Thus, it is seen that upon closing of the thermal switchI20,the'

solenoid I26 will be energized so as to move the terminal connection I28into electrical contact with the contact points I25 and I29 to close themotor circuit and throw the motor 55 into operation so as to circulatethe refrigerant through the cooling coil 52.

It will be understood that, if desired, the thermal unit I20 may bepositioned in the cooling liquid 11) so that the compressor motor 55will be thrown into and out of operation by the' changes in temperatureof the cooling liquid to contained in the pool at the bottom of thecabinet. It will also be noted that the electrical connections andswitches for the compressor motor 55 are substantially the same as theelectrical connections and switches used in connection with theindividual pump motors 28. The

switches 91 and I26 may all be contained withina single switch box 98mounted on the end wall 5 of the cabinet.

The thermal units may be encased in suitable insulation so that theiroperation is not affected either by the temperature of the coolingliquid dripping from the barrel or the spray hoops 40, or by otheroutside influences, except only the brew temperature in the passage e ofthe elbow connection 48. As shown more particularly in Figs. 7 and 8,the elbow connection 48 may be insulated by means of suitable insulatingmaterial 81 which is surrounded and contained within an outer shell orcasing comprising two half portions 88 and 89 which can be separated topermit ready removal and detachment of the elbow connection 48 from thesleeve '41. It will also be appreciated that when the elbow connection48 is sterilized, the thermal unit 90 may be withdrawn therefrom byunscrewing the threaded neck portion 9| thereof from the boss 92.

The brew is forced from the brew barrels by means of a suitable gas,such as air or carbon dioxide. The gas is supplied through a supplyconduit I40, as shown in Fig. 2, and is conducted to each barrel througha flexible branch conduit I4I. A suitable valve I 42 may be provided toregulate the flow of the gas through the supply escape of the desirablecarbon dioxide gas with by the brewer. It has been found that the brewwill best retain the most palatable amount of carbon dioxide gas whenthe pressure of the gas flowing through the branch conduits MI is in thenature of approximately 12 lbs. per square inch, which equilibriumpressure is maintained in each of the brew barrels during withdrawal ofthe brew therefrom.

It will now be understood that individual thermal switches and motorswitches controlling the operation of individual pump motors isprovided. Suitable stepdown transformers may be provided so as to reducethe voltage flowing through the thermal units 90 to a low voltage toeliminate danger of shock to the attendant, so that the operator or barattendant will not receive an electrical shock by reason of contact withwet surfaces surrounding the cabinet in event any electrical connectionshould become broken or dlsarranged. Likewise, the compressor motor 55is controlled in its operation by a thermal switch either placed in thecooling liquid at the bottom of the cabinet or attached to the returnpipe 58 through which the refrigerant gas returns to the compressor.

erates on a minimum of power and requires a minimum of attention. Thecooling cabinet and operating mechanism for cooling the brew barrels isrelatively simple in construction and is presented in a compact .unitwhich can be manufactured at relatively low cost and quickly installed.The brew dispensing mechanism' is adapted to be quickly and easilydetached from the brew barrel irrespective of the amount of brew thereinso that periodic cleaning and sterilization of the draft mechanism maybe efficiently and thoroughly effected. It will be appreciated thatvarious different forms of thermoelectric control devices in general'use may be associated with the mechanism and it is under-- stood thatthe thermal control unit, particularly shown in the drawings anddescribed above, are presented for the purpose of illustration only andnot by way of limitation.

While certain novel features of the invention have been disclosed andare pointed out in the annexed claims, it will be understood thatvarious omissions, substitutions and changes may be made by thoseskilled in the art without departing from the spirit of the invention.

What is claimed is:

1. A brew apparatus for use in a brew dispensary including, an enclosedchamber adapted to accommodate a plurality of brew transportationcontainers therein, refrigerating coils positioned adjacent the bottomof said chamber, a cooling device operative to circulate a film of thecooling liquid over a substantial partof such container walls to coolthe brew therein, means for collecting the cooling liquid which haspassed over such containers and conducting the same toward one end ofsaid chamber, and means for conducting said cooling liquid toward theopcollect the cooling liquid which has passed over such container,refrigerating means, and means for conducting the cooling liquidcollected in said pan into cooling contact with said refrigerating meansbefore said cooling liquid is again returned a substantial exterior areaof such container to cool the brew therein, a pan positioned above saidrefrigerating means to receive and collect the cooling fluid which haspassed over such container, and means for conducting said cooling fluidinto cooling contact with said refrigerating means.

4. A brew apparatus for use in a brew dispensary including, aheat-insulated cabinet adapted to accommodate a plurality of brewersbeverage barrels therein, refrigeratingmeans within said cabinetextending substantially the length thereof, means for spraying a coolingliquid over the exterior of such brewers beverage barrels positioned inthe cabinet to cool the brew therein, a pan supported in an inclinedposition for collecting and conducting the cooling liquid which haspassed over such brewers barrels toward one end of the cabinet, pumpsfor supplying cooling liquid to said spray means, and means forsupplying said pumps with cooling liquid drawn from the other end of thecabinet whereby the cooling liquid is required to flow into coolingcontact with substantially the entire length of said cooling meansbefore it enters said pumps.

5. A brew installation. including, an insulated cabinet adapted toaccommodate a plurality of brewers beverage barrels therein, areceptacle for cooling liquid, means for supporting said barrels inspaced relationship from said receptacle, a drip pan positioned abovesaid liquid receptacle, means for projecting a cooling liquid over oneof such barrels, a screen at one end of said pan through which thecooling liquiddripping from the barrel and into said pan may escape fromsaid pan, a pump adjacent one end of said pan opposite which said screenis located, means connected to said pump for supplying cooling liquid tosaid spray means, and cooling means in said receptacle operative to coolthe liquid in said receptacle.

6. A brew apparatus for use in a brew dispensary including, a cabinetadapted to contain a brewers" beverage barrel therein, means forprojecting a spray of cooling liquid over said barrel, a pump forsupplying cooling liquid to said spray means, thermc-electric controlmeans operative upon predetermined changes in temperature of the brew inor flowing from said barrel, a motor for driving said pump, and anelectric circuit electrically connecting said motor to saidthermo-electric control means.

7. A brew apparatus for association with,a brewers container in a brewdispensary, a spray head for forming a moving film of cooling liquidover the side walls of a beverage container, a pump, a motor for drivingsaid pump, a conduit connecting said pump and spray head, athermoelectric switch operative upon predetermined changes intemperature of the brew in or flowing from said container, a motorswitch for throwing said motor into and out of operation, and anelectric circuit electrically connecting said thermo-electric switch,motor switch and motor whereby to throw said motor into and out ofoperation in accordance with predetermined temperature changes of thebrew in the container.

8. A brew apparatus for use in a brew dispensary including, an insulatedcabinet adapted to accommodate a brewers beverage barrel therein, acooling liquid receptacle in said cabinet, a cooling coil positioned insaid receptacle operative to efiect heat exchange with the coolingliquid in said receptacle, a refrigerant compressor, a motor for drivingsaid compressor, conduits connecting said compressor to said coolingcoil, and a thermo-electric switch operative upon predetermined changesin temperature of said cooling liquid to throw said compressor motorinto and out of operation,

9. A brew apparatus for use in a brew dispensary including, a cabinetadapted to accommodate a brew container therein, a cooling coil in saidcabinet, a refrigerant compressor, a motor for driving said compressor,conduits connecting said compressor to said cooling coil, a motorswitch, a thermo-electric switch operative upon predetermined changes intemperature of the atmosphere in said cabinet, and an electric circuitconnecting said thermo-electric switch, motor.

switch and motor whereby said motor is thrown into and out of operationupon predetermined changes in temperature of the atmosphere in saidcabinet.

10. A brew apparatus for use in a brew dispensary including, a heatinsulated cabinet adapted to accommodate a plurality of brewers beveragebarrels therein, a spray device for each barrel accommodated within thecabinet, each spray being operative to project a cooling liquid over thebarrel associated therewith, a pump for each of said spray devices, aconduit connected ,to each pump and one of said spray devices forsupplying cooling liquid thereto, means for driving each of said pumps,and means for individually controlling said pump-driving means so as tothrow each pump into and out of operation upon predetermined changes intemperature of the brew in or flowing from each corresponding barrel.

11. A brew apparatus for use in a brew dispensary including, aninsulated cabinet adapted to accommodate a plurality of brewers beveragebarrels therein, a spray device for each barrel accommodated within thecabinet to project a spray of cooling liquid in cooling contacttherewith, individual means for supplying cooling liquid to each of saidspray devices, means for operating said cooling liquid supplying meansupon predetermined changes in temperature of the brew in the individualbarrels, a cooling coil in said cabinet, means for supplying refrigerantto said cooling coil, and means for controlling the flow of refrigerantthrough said cooling coil upon predetermined changes in temperatureoccurring within said cabinet.

12. Apparatus for use in a brew dispensary including an insulatedcabinet adapted to accommodate a removable brew container, a spray ring,means for supporting the spray ring in sur- .rounding relation to oneend of such container,

Y ous positions of adjustment, and a pump operative to supply coolingliquid from said receptacle to said spray ring through said supply lineand flexible conduit.

13. Apparatus for cooling brew in a brewers transportation barrelincluding a tubular spray ring, means connected to said ring adapted toengage such a brewers transportation barrel to removably support saidring in surrounding relation over the end of the barrel, and a flexiblecooling liquid supply conduit connected to said spray ring.

14. Brew cooling apparatus for use in a brew dispensary including,shower means for projecting cooling liquid over a container for brew,cooling liquid supply means including a pump and conduit for supplyingcooling liquid to said shower means, a driving motor operativelyconnected to said pump, a the'rmo-electric switch operative uponpredetermined changes in temperature of the brew in said container, andan electric circuit electrically connecting said motor to saidthermoelectric switch.

15. Brew cooling apparatus for use in a brew dispensary including, meansfor projecting a spray of cooling liquid over a brew container for thepurpose of cooling the brew contents thereof, a pump for supplyingcooling liquid to said spray means, thermo-electric control meansadapted for association with a brew conduit leading from said containerand operative upon predetermined temperature changes of the brewresiding in or flowing through said conduit, a motor for driving saidpump, and an electric circuit electrically connecting said motor to saidthermo-electric control means.

16. Brew cooling apparatus for use in a brew dispensary including, acabinet adapted to accommodate a brewers beverage container therein,

a thermo-electric switch device jmludmg thermal element adapted to"extend into'the beverage within or flowing from such brewers beveragecontainer and operative upon predetermined temperature changes of thebeverage residing in or flowing from said brewers con tainer, means forcooling the beverage in said container, means for supplying a coolingliquid to said cooling means, means operatively connecting saidthermo-electric switch device to said cooling liquid supply means forcontrolling the flow of cooling liquid in said cooling means uponpredetermined changes in temperature of the beverage residing in orflowing from said brewers container, and a casing of insulationsurrounding said thermal element to protect the same from temperaturechanges other than the changes in temperature of the beverage residingin or flowing from said brewers container.

17. Apparatus for cooling brew including, a cabinet, said cabinet havinga cooling chamber provided with insulated walls adapted to accommodate abrew container therein, cooling coils in said cabinet, a refrigerantcompressor positioned exterior to the insulated walls of said coolingchamber, a conduit extending from said compressor through an insulatedwall of said chamber and connected to said coil for supplying a coolingrefrigerant thereto, a motor operatively loonnected to said compressorfor driving the same, a thermo-electric switch having a thermal elementin said insulated chamber, a motor switch, and an electric circuitelectrically connecting said thermo-electric switch, motor switch andmotor, said thermo-electric switch being operative through said motorswitch to throw said motor into and out of operation in accordance withpredetermined temperature changes occurring in said insulated chamber.

JOHN M. BRUCE.

